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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LVOtLwv/Cvl11tUYp50SksGWhQhY11SC0NIkGuc8zKg=; b=hvglInwe6nvBIC1CFmgPT2B4k9tv8oQOE++Z7lyuwA0AXIo42fYLgmcNfFTnf6PNGO ulQwERgLE+yGHt4ej2N4XsmoDr1fPjqhnPok4oeFNJWoy9vp8At6OWd9Tkktf/7BJRQF nM6yVqgxfkYvfPFmfyCFMefMtEwdjkYBnM8rcEhMYXjFSZpJlJDQ5WuMzaJw4s2s7wlE 4S8lmaABACvDZvURAOhfOohaT5FFYq1lxJsVgmFaHxIXunPgFNmzlRmXbDbb9lGUjB0p 20+PpkNvimg93dYUHgZprZ5DnckjoiZr1t6uPGZZNXl3+0HI20aoS6twtwIMIF/gCS5R 7ufA== X-Gm-Message-State: AOAM530y41hnFTxV2LDASbv7cKog5R4yZ1UPb3tvi+tAPLZc/WmRCesw PyHocTWwpKjnyj5809nMoGJwEKf4qjmR8TJJqEnB9w== X-Google-Smtp-Source: ABdhPJytFy6lsxbxptEBJHanuAZiQiJRjagWMLPmEYrRnXLJYMLE9doc2W4BiVdJO1Ek3tqEEHDclPE0n0pEuhpOHu8= X-Received: by 2002:a17:906:94c4:: with SMTP id d4mr69283452ejy.232.1594596890894; Sun, 12 Jul 2020 16:34:50 -0700 (PDT) MIME-Version: 1.0 References: <20200624203200.78870-1-samitolvanen@google.com> <671d8923-ed43-4600-2628-33ae7cb82ccb@molgen.mpg.de> In-Reply-To: <671d8923-ed43-4600-2628-33ae7cb82ccb@molgen.mpg.de> From: Sami Tolvanen Date: Sun, 12 Jul 2020 16:34:39 -0700 Message-ID: Subject: Re: [PATCH 00/22] add support for Clang LTO To: Paul Menzel X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200712_193454_521522_CFCCAA0D X-CRM114-Status: GOOD ( 14.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch , X86 ML , Kees Cook , "Paul E. McKenney" , Kernel Hardening , Greg Kroah-Hartman , Masahiro Yamada , linux-kbuild , Nick Desaulniers , LKML , clang-built-linux , linux-pci@vger.kernel.org, Will Deacon , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Jul 11, 2020 at 9:32 AM Paul Menzel wrote: > Thank you very much for sending these changes. > > Do you have a branch, where your current work can be pulled from? Your > branch on GitHub [1] seems 15 months old. The clang-lto branch is rebased regularly on top of Linus' tree. GitHub just looks at the commit date of the last commit in the tree, which isn't all that informative. > Out of curiosity, I applied the changes, allowed the selection for i386 > (x86), and with Clang 1:11~++20200701093119+ffee8040534-1~exp1 from > Debian experimental, it failed with `Invalid absolute R_386_32 > relocation: KERNEL_PAGES`: I haven't looked at getting this to work on i386, which is why we only select ARCH_SUPPORTS_LTO for x86_64. I would expect there to be a few issues to address. > > arch/x86/tools/relocs vmlinux > arch/x86/boot/compressed/vmlinux.relocs;arch/x86/tools/relocs --abs-relocs vmlinux > > Invalid absolute R_386_32 relocation: KERNEL_PAGES KERNEL_PAGES looks like a constant, so it's probably safe to ignore the absolute relocation in tools/relocs.c. Sami _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel